java 9 compliance

- launch4j

build.xml

@@ -428,14 +428,14 @@
         </echoxml>
     </target>    
     <target name="-exe-linux" unless="is_windows" depends="-load-tools,-exe-config">
-        <exec dir="${launch4j.path}" executable="${launch4j.path}/launch4j" failonerror="true">
-            <arg file="${exe.config}" />
-        </exec>
+        <java jar="${launch4j.path}/launch4j.jar" fork="true">
+            <arg line="${exe.config}" />
+        </java>
     </target>
     <target name="-exe-windows" if="is_windows" depends="-load-tools,-exe-config">
-        <exec dir="${launch4j.path}" executable="${launch4j.path}\launch4jc.exe" failonerror="true">
-            <arg file="${exe.config}" />
-        </exec>
+        <java jar="${launch4j.path}/launch4j.jar" fork="true">
+            <arg line="${exe.config}" />
+        </java>
     </target>   
     <target name="exe" depends="-set-gui-type,-exe-linux,-exe-windows">
         

travis/before_install.sh

@@ -39,8 +39,8 @@ cp ./travis/tools/nsis-3.0-addon.zip ./
 unzip -u nsis-3.0-addon.zip -d $tools_dir/nsis-3.0-src
 
 #Extract launch4j - tool for creating EXE file from Java
-cp ./travis/tools/launch4j-3.9-linux.tgz ./
-tar zxvf launch4j-3.9-linux.tgz -C $tools_dir >/dev/null
+cp ./travis/tools/launch4j-3.12-linux.tgz ./
+tar zxvf launch4j-3.12-linux.tgz -C $tools_dir >/dev/null
 
 #Create tools.properties with paths to NSIS and launch4j
 echo "nsis.path = $tools_dir/nsis-3.0-src/bin" > tools.properties